Please check your theme files if the theme was updated successfully .
sometimes due to some error all the theme files does not gets copied to desired location .
Please follow this tip to manually update the theme again
https://wplms.io/support/knowledge-base/manually-updating-wplms/
to make sure that all the files gets copied.
Apart from this we would need to check at your end exactly what error is appearing.
Please create your own topic and share your site url , admin credentials and a valid ftp credentials there in private reply.
I asked you to create different topic coz of private information asked which should be safe to be share on your topic only as the topic creator and vibethemes staff can see the content of private reply .